This comprehensive biography of famous physicist J. Robert Oppenheimer is a meticulously researched, riveting work by two respected historians. Using personal and public documents, as well as interviews with members of Oppenheimer's family, friends, former students, and professional associates, the authors provide new insights into one of the twentieth century's most interesting and influential scientists. The chapters give detailed descriptions of the scientist's relations with his parents, the women in his life, his scientific colleagues, members of the military and the government, and his friends. The well-written narrative moves from his childhood, education, and early academic career to his leadership of the Manhattan Project, his post-WW II opposition to the development of the hydrogen bomb, and the revoking of his security clearance by the U.S. Atomic Energy Commission (AEC). An extensive bibliography and footnotes support the text.